Select your product to confirm this information applies to you
LIDAR-Lite v3/v3HP Laser Beam Spread
At very close distances (less than 1m) the beam diameter is about the size of the aperture (lens). For distances greater than 1m, you can estimate the beam diameter using this equation:
Distance/100 = beam diameter at that distance (in whatever units you measured the distance)
The actual spread is ~8 milli-radians or ~1/2 degree.